Arple

Hello...first time here. I have an 88 Comanche, not sure which automatic transmission it is. Am trying to change the transmission filter and cannot get the dipstick tube apart from the portion attached to the filter pan. Anyone have any great ideas? Have already broken the mounting bracket trying to get this press fitting to let loose, have 'Zep'd' and used a rubber hammer...no luck so far. Is there a tool that may assist? Thank you for any help!